Valve grinder



9, 1947. A. B; RIEGEL 2,425,898

. VALVE GRINDER Filed March 25, 1947- Fll l INVVENTOR- A05 //'/7 5. P/ge/ BY ATTORNEY Patented Aug. 19, 1947 UNITED STATES ATENT OFFICE VALVE GRINDER Austin Benjamin Riegel, San Francisco, Calif.

Application March 25, 1947, Serial No. 737,058

13 Claims.

This invention relates generally to valve grinders, and particularly to a small portable device of this character adapted particularly for use by the home mechanic or small shop owner in connection with the grinding and reseating of conventional automobile valves of the poppet type.

It is an object of the present invention to provide a device of this character which is light, compact, and easily portable. Heretofore devices which have been intended to accomplish the results have either been complicated or have been unduly bulky in size.

It is a further object of this invention to provide a device of the character described which is simple to manufacture and which contains a minimum number of wearing parts.

It is a further object of the present invention to provide a valve grinder which will, in addition to providing annular oscillation of the valve being ground, also provide for progressive advance of the valve from one oscillating position to another. As is well known to those skilled in the art two types of motion are desirable and necessary in connection with grinding the average automobile valve. The first type of motion is annular oscillation about the axis of the valve stem whereby the valve reciprocates back and forth within the seat into which it is being seated. In addition to that it has been necessary to change the oscillation or reciprocation position from time to time to securean even grinding end.

Further objects and advantages of the present invention will appear from the following specification taken in conjunction with the accompanying drawing in which:

Figure 1 is a top plan view of a valve grinding device incorporating my invention.

Figure 2 is a partial cross-sectional view of the device shown in Figure 1.

Figure 3 is a cross-sectional view of the device, taken along the line 33 of Figure 2.

Figure 4 is a cross-sectional detail of the device shown in Figures 1 and 2 and taken along the line 4-4 of Figure 2.

Figure 5 is an expanded or unrolled view of the device shown in Figure 2.

Figure 6 is an expanded or unrolled view of a modification of the device shown in the previous figures.

Figure '7 is a diagrammatic view of the path of oscillation and rotation of the device as illustrated in Figure 5.

As shown in Figure 1 my valve grinder con.-

sists generally of a gripping member or suction cup H] which i suitably secured to one end of a shaft l l. The other end of the shaft ll extends into a housing or handle l2 and is adapted to reciprocate with respect thereto.

The suction cup [0 or gripping member is preferably made of rubber or some other readily deformable material in order that the lip 13 will readily engage and grip avalve member adapted to be ground. The method of securing the suction cup It to the shaft l I is unimportant, it being necessary only that the same be securely mounted with respect thereto.

On that end of shaft ll remote from the suction cup end I have provided a spider M which is suitably secured to the shaft II and adapted to rotate and reciprocate therewith. The spider i4 is provided with a plurality of extending teeth i B which are adapted to engage selected cam surfaces of selected cam tracks as will more fully hereinafter be explained.

As shown in Figures 1 and 2 the housing or handle l2 consists of a split shell I! on the ends of which are mounted caps 18 and I9 respectively. Cap I9 is provided with an orifice 2| through which shaft l I is adapted to extend and with respect to which it is adapted to reciprocate. The shell I! is provided with two sets of detents 22 and 23 which are adapted to cooperate with corresponding orifices 24 and 26 in a pair of members 2'! and 28 which are thereby securely held within the shell I! against longitudinal or rotational movement with respect thereto.

As shown in Figure 2 and more particularly in Figure 5, the members 21 and 28 present a plurality of similar and identical teeth 21a, 1), c and d and 280., b, c and d respectively. As is shown in Figures 2 and 5 these teeth extend toward each other and are coaxially aligned with respect to the longitudinal axis of both the handle !2 and the shaft l I. As is apparent from an examination of Figures 2 and 5 the teeth 21a and b form a cam track 3|, teeth 21b and 210 form a cam track 32, teeth 21c and d form a cam track 33, and teeth 21d and 21a form a cam track 34. As will be observed each cam track as above identified provides a pair of cam surfaces 31a and 31b, for example. It is apparent that tooth-like members 28a, b, c, and d likewise form a plurality of cam tracks 35, 36, 31 and 38. Cam track 35 provides a pair of cam surfaces 35a and 35b. In like manner, cam surfaces 36a and b, 3111 and b and 38a and b are provided.

As is shown in Figures 2 and 5 the various cam tracks (H to 34 inclusive and 35 to 38 inclusive are staggered with respect to each other. Upon reciprocation of shaft II and spider I4 the teeth I6 of spider I4 engage certain of the cam tracks and cam surfaces heretofore described. For example, as shown in Figure 5, upon reciprocation of the spider I4 one tooth I6 of the same will engage cam surface 3Ia upon reciprocation of the handle in one direction. When the handle has reached one extreme of its longitudinal reciprocation and the toothed spider within the same has moved in the opposite direction the spider will engage cam surface 3Ib. From cam surface 3Ib it will next engage cam surface 35a and upon change of direction of movement of handle I2 will engage cam surface 35b. The path of the tooth I6 within the handle I2 is shown in Figure 5 and is as follows: The tooth I6 will engage first one cam track then another and then will be advanced to another cam track. Under no circumstances will the tooth I6 merely reciprocate Within two adjacent cam tracks but, as is obvious, will move progressively from one to another by virtue of the interrupted and staggered relationship of the two sets of cam tracks 3I to 34 inclusive and 35 to 38 inclusive.

Operation of the device may more fully be described as follows. The suction cup In is engaged with a valve member which is adapted to be ground. As is well known to those skilled in the art, proper valve grinding and seating depends upon the valve being placed within the seat to which it is to be ground and oscillated about the longitudinal axis of the valve stem. A valve grinding compound is customarily placed within the space between the valve and the valve seat. It is further necessary, from time to time, to change the station of angular oscillation in order to obtain an even seating of the valve around its entire periphery with the periphery of the valve seat. When the suction cup I is securely engaged with the valve (not shown) the handle I2 is reciprocated along the longitudinal axis of the shaft II. Upon reciprocation of the handle I2 and its cooperating cam tracks, all of which have been heretofore described, the tooth I6 of the spider I4 engages the cam tracks generally as shown in Figure 5. Specifically, upon downward movement of the handle I2 the tooth I6 engages cam surface 3Ia until it reaches the uppermost limit thereof. Upon movement of handle I2 in an upward direction, the tooth I6 engages cam surface 3 lb until it reaches the lower limit thereof from which point it follows cam surface 35a until it reaches the lower limit thereof. At this point the handle I2 is moved downwardly, or toward the suction cup I 0. engages cam surface 35b until it reaches the uppermost limit thereof from which it follows cam track 32a, until it reaches its upper limit. At this time the handle I2 is next moved upwardly or to a position remote from the suction cup I6 whereby the tooth I6 engages cam surface 321) until it reaches the lower extension thereof from which point it engages the cam surface 36a. The reciprocation of handle I2 and its cooperating parts with respect to the shaft II is continued whereby the tooth I6 follows each of the cam tracks SI, 35, 32, 36, 33, 31, 34 and 38 in that order. It will be seen therefore that the tooth I6 will tend to advance generally as shown in the broken lines in Figure 5 and ultimately make a complete circuit with respect to said cam traclm and will, as a matter of course, likewise tend to rotate shaft II completely about its longitudinal The tooth I 6 then axis. In addition to completely rotating the shaft I I about its vertical axis, it will also cause oscillation of shaft II about its longitudinal axis at the same time as shown in Figure 7. As is shown in Figure 5, whenever the tooth I6 engages any one of the cam surfaces 31a, 32a, 33a, 34a, 35a, 36a, 31a, or 38a the tooth I6 is being advanced to the right as shown in Figure 5 or, as shown in Figure '7, in a clockwise direction. On the other hand whenever the tooth I6 engages any one of the cam surfaces 3Ib, 32b, 33b, 34b, 35b, 36b, 31b or 382) it is being oscillated in a counterclockwise direction. Upon each complete reciprocation of the handle I2 from, for example, its extreme uppermost position through its extreme down position and returning to its extreme uppermost position, the shaft I I is rotated a quarter of a turn in a clockwise direction. At the same time, however, it is being operated in a counter clockwise direction when the tooth I6 engages cam surface 35b, in a clockwise direction when the tooth I6 engages cam surface 32a, in a counterclockwise direction when the tooth I6 engages cam surface 325 and again in a clockwise direction when the tooth I6 engages the cam surface 35a. While the tooth I6 has changed its direction four times it has ultimately advanced a quarter of a revolution about the longitudinal axis of shaft II. In this manner rapid annular oscillation of the member ID is provided upon each reciprocation of handle I2 and, at the same time, progressive rotation of the device about the longitudinal axis of shaft II is likewise obtained.

In the modification shown in Figure 6 a plurality of ribs, 40, 4|, 42 and 43 are provided and substituted for the members 2'! and 28 of the device shown in Figure 2. These ribs form a plurality of cam tracks 45, 46, 4! and 48 which provide cam surfaces 45a, 45b, 46a, 46b, 41a, 41b, 48a, 48b respectively. When the handle and its cooperating ribs 40, 4|, 42 and 43 are moved longitudinally with respect to the shaft I I, as has previously been described, the tooth I6 of spider I4 engages the cam surfaces generally as shown in the broken lines of Figure 6. For example when the handle is moved away from the suction cup II] the spider I4 engages first cam surface 41b. When the handle reaches the most remote position and begins its stroke in the opposite direction the tooth I6 moves straight upwardly from its lowermost position until it strikes cam surface Ala which it then follows to its uppermost extreme. It will be obvious that the shaft I I is then being rotated. The cup I 0 is in engagement with a valve which, it will be recalled, is in frictional engagement with the valve seat to which it is being seated. As has previously been pointed out the suction cup I0 is preferably made of rubber or some other readily deformable and resilient material. As the valve is being turned within its seat it tends to lag behind the rotation of the shaft II inasmuch as the resiliency of the cup In permits a certain amount of lag. Therefore when the tooth I6 approaches the upper limits of cam surface 4111 it tends to be urged against the same with a certain amount of pressure and, when the tube I6 reaches the upper limit of cam surface 41a it tends to go over the top of rib 42 by virtue of the resiliency of the suction cup In and the frictional drag of the contact between the valve and the valve seat. When the tooth I5 has passed over the extreme uppermost end of the rib 42 it is then in engagement with cam track 46 and, as has previously been described in connection with its passage through cam track 41, will engage cam surfaces 45b and 46a in that order. In this manner the tooth it will move from cam track to cam track thereby advancing the station of oscillation of the suction cup ID.

It is obvious that when the tooth l6 engages cam surface 47b the cup is oscillated in one direction. On the other hand when the tooth l6 engages cam surface 470, the cup is oscillated in another direction. Therefore with each stroke of the handle the tooth I6 is oscillated forwardly and baclcwardly and, in addition thereto, is advanced from one cam track to another thereby advancing a full 90 about the periphery of the cup I 0.

I claim:

1. In a device of the character described, a valve engaging member, a shaft secured to said valve engaging member, a spider secured to said shaft, a handle adapted to reciprocate with respect to said shaft, a plurality of cam tracks associated with said handle and adapted to engage said spider to cause oscillation of and progressive advance of said valve engaging member.

2. In a device of the character described, a valve engaging member, a spider secured to said valve engaging member, a handle adapted to reciprocate with respect to said valve engaging member, a plurality of cam tracks adapted to engage said spider to cause oscillation of and progressive advance of said valve engaging member.

3. In a device of the character described, a valve engaging member of the suction type, a shaft secured to said valve engaging member, a spider secured to said shaft at the end remote from said valve engaging member, a handle adapted to reciprocate with respect to said shaft, a plurality of staggered cam tracks associated with said handle and adapted to engage said spider to cause oscillation of and progressive ad- Vance of said valve engaging member.

4. In a device of the character described, a valve engaging member, a spider secured to said valve engaging member, a handle adapted to reciprocate with respect to said valve engaging member, a plurality of cam tracks associated with said handle and adapted to engage said spider, said cam tracks being staggered.

5. In a device of the character described, a valve engaging member, a shaft secured to said valve engaging member, a spider secured to said shaft at the end remote from said valve engaging member, teeth on said spider, a handle adapted to reciprocate with respect to said shaft, a plurality of cam tracks associated with said handle and adapted to engage the teeth on said spider, said cam tracks being staggered and forming interrupted cam surfaces.

6. In a device of the character described, a valve engaging member, a shaft secured to said valve engaging member, a spider secured to said shaft at the end remote from said valve engaging member, teeth on said spider, a handle adapted to reciprocate with respect to said shaft, two series of helical cam tracks associated with said handle and adapted to engage the teeth on said spider, said series of cam tracks being staggered with respect to each other.

7. In a device of the character described, a valve engaging member, a shaft secured to said valve engaging member, a spider secured to said shaft at the end remote from said valve engaging member, a handle adapted to reciprocate with respect to said shaft and along its longitudinal axis, a plurality of cam tracks associated with said handle and adapted to engage said spider, said cam tracks being sta gered and forming a plurality of interrupted cam surfaces to provide annular oscillation of the valve engaging member and progressive advance of the same about its vertical axis.

8. In a device of the character described, a valve engaging member, a shaft secured to said valve engaging member, a spider secured to said shaft at the end remote from said valve engaging member, a handle adapted to reciprocate with respect to said shaft, a plurality of helical cam tracks associated with said handle, said cam tracks being staggered and forming a plurality of interrupted cam surfaces adapted to engage said spider to provide annular oscillation of the valve engaging member and progressive advance of the same about its vertical axis.

9. In a device of the character described, a valve engaging member, a shaft secured thereto, a spider secured to said shaft, a tooth on said spider, a handle coaxially aligned with said shaft and adapted to reciprocate with respect thereto, a plurality of cam tracks generally coxially aligned therewith and helical with respect thereto and adapted to be engaged by the tooth on said spider upon reciprocation of'said handle and cam tracks with respect to said shaft, said cam tracks being staggered and formng a plurality of interrupted cam surfaces whereby upon reciprocation of said handle in one direction said tooth engages one cam surface on one of said cam tracks and upon reciprocation in the other direction it engages an opposed surface on said cam track and upon reciprocation again in said first direction engages another of said cam tracks.

10. In a device of the character described, a valve engaging member, a shaft secured to said valve engaging member, a spider secured to said shaft at the end remote from said valve engaging member, a handle adapted to reciprocate with respect to said shaft, a plurality of cam tracks generally adapted to be engaged by said spider upon reciprocation of said handle and cam tracks with respect thereto, said cam tracks being helical and staggered and forming a plurality of interrupted cam surfaces whereby upon reciprocation of said handle said spider engages said helical cam surfaces and oscillates and engages said staggered cam surfaces and advances from cam track to cam track.

11. In a device of the character described, a valve engaging member, a shaft secured to said valve engaging member, a spider secured to said shaft at the end remote from said valve engaging member, a tooth on said spider, a handle adapted to reciprocate with said shaft, a plurality of cam tracks associated with said handle and adapted to engage said tooth, said cam tracks being staggered whereby upon each reciprocation of said handle and said cam tracks with respect to said shaft and said tooth, said tooth will engage the neXt succeeding cam track.

12. In a device of the character described, a valve engaging member, a shaft secured thereto, a spider secured to said shaft, a handle adapted to reciprocate with said shaft, a plurality of cam tracks associated with said handle and adapted to engage said spider, said cam tracks being staggered whereby upon each reciprocation of said handle and said cam tracks with respect to said shaft, said spider will advance from cam track to cam track.

13. In a device of the character described, a

valve engaging member, a shaft secured to said valve engaging member, a spider secured to said shaft at the end remote from said valve engaging member, a handle adapted to reciprocate with said shaft, a plurality of cam tracks associated with said handle and adapted to engage said spider, said cam tracks being helical with respect to said handle whereby said valve engaging member oscillates upon reciprocation of said handle and cam tracks with respect to said shaft, and said cam tracks being staggered whereby upon each reciprocation of said handle and said cam tracks with respect to said shaft, said spider will engage the next succeeding cam track and the station of oscillation of said valve engaging memher will advance.

AUSTIN BENJAMIN RIEGEL. 

